package com.carbeauty.controller;

import com.carbeauty.entity.Customer;
import com.carbeauty.service.CustomerService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 仪表盘控制器
 * 
 * 功能说明:
 * - 系统首页数据展示
 * - 业务统计数据
 * - 图表数据接口
 * - 实时数据监控
 * 
 * 权限要求:
 * - 管理员、店长可以查看所有统计数据
 * - 员工可以查看基础统计数据
 * - 客户只能查看个人相关数据
 * 
 * @author CarBeauty Team
 */
@Controller
@RequestMapping("/dashboard")
public class DashboardController {
    
    @Autowired
    private CustomerService customerService;
    
    // TODO: 注入其他服务
    // @Autowired
    // private OrderService orderService;
    // @Autowired
    // private MaterialService materialService;
    // @Autowired
    // private ServiceService serviceService;
    
    // ==================== 页面控制器 ====================
    
    /**
     * 仪表盘首页
     */
    @GetMapping
    public String dashboard(Model model) {
        // 获取基础统计数据
        model.addAttribute("customerCount", customerService.getTotalCustomerCount());
        model.addAttribute("todayNewCustomers", customerService.getTodayNewCustomerCount());
        model.addAttribute("monthNewCustomers", customerService.getThisMonthNewCustomerCount());
        model.addAttribute("totalBalance", customerService.getTotalBalance());
        model.addAttribute("totalPoints", customerService.getTotalPoints());
        model.addAttribute("totalConsumption", customerService.getTotalConsumption());
        
        // TODO: 添加其他统计数据
        // model.addAttribute("orderCount", orderService.getTotalOrderCount());
        // model.addAttribute("todayOrders", orderService.getTodayOrderCount());
        // model.addAttribute("todayRevenue", orderService.getTodayRevenue());
        // model.addAttribute("materialCount", materialService.getTotalMaterialCount());
        // model.addAttribute("lowStockMaterials", materialService.getLowStockCount());
        
        return "dashboard/index";
    }
    
    /**
     * 客户统计页面
     */
    @GetMapping("/customers")
    public String customerStats(Model model) {
        model.addAttribute("title", "客户统计分析");
        return "dashboard/customers";
    }
    
    /**
     * 订单统计页面
     */
    @GetMapping("/orders")
    public String orderStats(Model model) {
        model.addAttribute("title", "订单统计分析");
        return "dashboard/orders";
    }
    
    /**
     * 材料统计页面
     */
    @GetMapping("/materials")
    public String materialStats(Model model) {
        model.addAttribute("title", "材料统计分析");
        return "dashboard/materials";
    }
    
    /**
     * 财务统计页面
     */
    @GetMapping("/finance")
    public String financeStats(Model model) {
        model.addAttribute("title", "财务统计分析");
        return "dashboard/finance";
    }
    
    // ==================== API接口 ====================
    
    /**
     * 获取仪表盘概览数据
     */
    @GetMapping("/api/overview")
    @ResponseBody
    public ResponseEntity<Map<String, Object>> getOverviewData() {
        Map<String, Object> data = new HashMap<>();
        
        // 客户统计
        Map<String, Object> customerStats = new HashMap<>();
        customerStats.put("total", customerService.getTotalCustomerCount());
        customerStats.put("todayNew", customerService.getTodayNewCustomerCount());
        customerStats.put("monthNew", customerService.getThisMonthNewCustomerCount());
        customerStats.put("totalBalance", customerService.getTotalBalance());
        customerStats.put("totalPoints", customerService.getTotalPoints());
        customerStats.put("totalConsumption", customerService.getTotalConsumption());
        customerStats.put("avgConsumption", customerService.getAverageConsumption());
        data.put("customers", customerStats);
        
        // TODO: 添加其他统计数据
        // 订单统计
        Map<String, Object> orderStats = new HashMap<>();
        orderStats.put("total", 0); // orderService.getTotalOrderCount()
        orderStats.put("todayNew", 0); // orderService.getTodayOrderCount()
        orderStats.put("todayRevenue", BigDecimal.ZERO); // orderService.getTodayRevenue()
        orderStats.put("monthRevenue", BigDecimal.ZERO); // orderService.getMonthRevenue()
        data.put("orders", orderStats);
        
        // 材料统计
        Map<String, Object> materialStats = new HashMap<>();
        materialStats.put("total", 0); // materialService.getTotalMaterialCount()
        materialStats.put("lowStock", 0); // materialService.getLowStockCount()
        materialStats.put("expired", 0); // materialService.getExpiredCount()
        materialStats.put("totalValue", BigDecimal.ZERO); // materialService.getTotalStockValue()
        data.put("materials", materialStats);
        
        // 服务统计
        Map<String, Object> serviceStats = new HashMap<>();
        serviceStats.put("total", 0); // serviceService.getTotalServiceCount()
        serviceStats.put("popular", 0); // serviceService.getPopularServiceCount()
        serviceStats.put("avgPrice", BigDecimal.ZERO); // serviceService.getAveragePrice()
        data.put("services", serviceStats);
        
        return ResponseEntity.ok(data);
    }
    
    /**
     * 获取客户统计图表数据
     */
    @GetMapping("/api/customer-charts")
    @ResponseBody
    public ResponseEntity<Map<String, Object>> getCustomerChartData() {
        Map<String, Object> data = new HashMap<>();
        
        // 会员等级分布
        List<Object[]> memberLevelStats = customerService.getMemberLevelStatistics();
        data.put("memberLevelDistribution", memberLevelStats);
        
        // 余额排行榜
        List<Customer> balanceRanking = customerService.getBalanceRanking(10);
        data.put("balanceRanking", balanceRanking);

        // 积分排行榜
        List<Customer> pointsRanking = customerService.getPointsRanking(10);
        data.put("pointsRanking", pointsRanking);

        // 消费排行榜
        List<Customer> consumptionRanking = customerService.getConsumptionRanking(10);
        data.put("consumptionRanking", consumptionRanking);

        // 活跃客户统计
        List<Customer> activeCustomers = customerService.findActiveCustomers();
        List<Customer> inactiveCustomers = customerService.findInactiveCustomers(90);
        data.put("activeCount", activeCustomers.size());
        data.put("inactiveCount", inactiveCustomers.size());
        
        return ResponseEntity.ok(data);
    }
    
    /**
     * 获取订单统计图表数据
     */
    @GetMapping("/api/order-charts")
    @ResponseBody
    public ResponseEntity<Map<String, Object>> getOrderChartData() {
        Map<String, Object> data = new HashMap<>();
        
        // TODO: 实现订单统计图表数据
        // 订单状态分布
        // 每日订单趋势
        // 服务项目销量排行
        // 月度营收趋势
        
        return ResponseEntity.ok(data);
    }
    
    /**
     * 获取材料统计图表数据
     */
    @GetMapping("/api/material-charts")
    @ResponseBody
    public ResponseEntity<Map<String, Object>> getMaterialChartData() {
        Map<String, Object> data = new HashMap<>();
        
        // TODO: 实现材料统计图表数据
        // 材料分类分布
        // 库存预警统计
        // 材料消耗趋势
        // 供应商分布
        
        return ResponseEntity.ok(data);
    }
    
    /**
     * 获取财务统计图表数据
     */
    @GetMapping("/api/finance-charts")
    @ResponseBody
    public ResponseEntity<Map<String, Object>> getFinanceChartData() {
        Map<String, Object> data = new HashMap<>();
        
        // TODO: 实现财务统计图表数据
        // 收入支出趋势
        // 支付方式分布
        // 费用分类统计
        // 利润分析
        
        return ResponseEntity.ok(data);
    }
    
    /**
     * 获取实时数据
     */
    @GetMapping("/api/realtime")
    @ResponseBody
    public ResponseEntity<Map<String, Object>> getRealtimeData() {
        Map<String, Object> data = new HashMap<>();
        
        // 今日实时数据
        data.put("todayCustomers", customerService.getTodayNewCustomerCount());
        // data.put("todayOrders", orderService.getTodayOrderCount());
        // data.put("todayRevenue", orderService.getTodayRevenue());
        // data.put("onlineUsers", userService.getOnlineUserCount());
        
        // 系统状态
        data.put("systemStatus", "正常");
        data.put("lastUpdateTime", System.currentTimeMillis());
        
        return ResponseEntity.ok(data);
    }
    
    /**
     * 获取业务预警数据
     */
    @GetMapping("/api/alerts")
    @ResponseBody
    public ResponseEntity<Map<String, Object>> getAlertData() {
        Map<String, Object> data = new HashMap<>();
        
        // 客户相关预警
        List<Customer> lowBalanceCustomers = customerService.findLowBalanceCustomers(new BigDecimal("100"));
        data.put("lowBalanceCustomers", lowBalanceCustomers.size());

        List<Customer> inactiveCustomers = customerService.findInactiveCustomers(90);
        data.put("inactiveCustomers", inactiveCustomers.size());
        
        // TODO: 添加其他预警数据
        // 库存预警
        // data.put("lowStockMaterials", materialService.getLowStockMaterials().size());
        // data.put("expiredMaterials", materialService.getExpiredMaterials().size());
        
        // 订单预警
        // data.put("pendingOrders", orderService.getPendingOrders().size());
        // data.put("overdueOrders", orderService.getOverdueOrders().size());
        
        return ResponseEntity.ok(data);
    }
}
